Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:13:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Del(int, int)’: user.cpp:19:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Euler(int)’: user.cpp:57:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[res[i]].size();j++) ^ user.cpp:84:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[res[i]].size();j++) ^ user.cpp:93:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[res[i+1]].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:128:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<c[i].size();j++) ^ user.cpp:160:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++) ^